Effects of variable properties of composites constituents with temperature on superplastic forming process of MMCs

سال انتشار: 1389
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 1,606

فایل این مقاله در 5 صفحه با فرمت PDF قابل دریافت می باشد

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این مقاله:

شناسه ملی سند علمی:

ISME18_508

تاریخ نمایه سازی: 1 تیر 1389

چکیده مقاله:

In aerospace applications structures weight is considered as a major performance parameter. One of the most effective ways for weight reduction is superplastic forming. By this technique, not only the weight, but also the stress concentration, the cost, and the manufacturing time are noticeably reduced. Additionally, the components with complicated shapes could be formed in a single manufacturing step. Due to the wide demand for whiskers reinforced metal matrix composites (MMCs) in aerospace industries, many research works have been designed to extend the borders of superplastic forming to MMCs materials. In the present study, an axisymmetric micromechanical finite element model is developed to predict the superplastic behavior of Al-SiC composite. Here, the effects of variations of materials properties on the superplastic forming process are highlighted. In most of the available numerical studies this phenomenon has been ignored. Here, the Internal Stress Superplasticity (ISS) mechanism is considered. This mechanism involves a thermal cycling load (e.g. 100°- 450°-100°c, 50s heating, 150s cooling) accompanied by a constant biasing mechanical load (e.g. 2, 4, 7, 10 Mpa). The effects of variation of yield strength, Coefficient of Thermal Expansion (CTE) withtemperature on plastic strain of the MMC are investigated. According to the results, in the mentioned temperature range, the properties of the MMC matrix material are highly changed. This potentially could affect both the plastic strain amount and rate. As it is seen, the effects of change in yield strength on plastic strain response of the composite are more pronounced than the CTE. In fact, it seems in ISS process, the variation of yield strength plays a key role.

کلیدواژه ها:

نویسندگان

M Tehrani

Master of Science Student, Sharif University of Technology, Aerospace Engineering

A Abedian

Associate Professor, Sharif University of Technology, Aerospace Engineering

مراجع و منابع این مقاله:

لیست زیر مراجع و منابع استفاده شده در این مقاله را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود مقاله لینک شده اند :
  • ing, H., Wang, C., Zhang, K., and Wang, Z., 200)4. ...
  • Barens, A. J., 2001, :Industrial applications of superplastic forming; trends ...
  • bedian, A., Barakati, A., and Malekpour, A., 2006, :Effect of ...
  • Huang, Y. D., Hort, N., Dieringa, H., Kainer, K. U., ...
  • Nam, T., Requena, G., Degischer, P., 2008, _ expansion behavior ...
  • نمایش کامل مراجع